Java Swing: Enabling/Disabling all components in JPanel

Question

I have a JPanel which contains a JToolbar (including few buttons without text) and a JTable and I need to enable/disable (make internal widgets not clickable). I tried this:

Answer 1

It requires a recursive call.

import java.awt.*;
import javax.swing.*;

public class DisableAllInContainer {

    public void enableComponents(Container container, boolean enable) {
        Component[] components = container.getComponents();
        for (Component component : components) {
            component.setEnabled(enable);
            if (component instanceof Container) {
                enableComponents((Container)component, enable);
            }
        }
    }

    DisableAllInContainer() {
        JPanel gui = new JPanel(new BorderLayout());

        final JPanel container = new JPanel(new BorderLayout());
        gui.add(container, BorderLayout.CENTER);

        JToolBar tb = new JToolBar();
        container.add(tb, BorderLayout.NORTH);
        for (int ii=0; ii<3; ii++) {
            tb.add(new JButton("Button"));
        }

        JTree tree = new JTree();
        tree.setVisibleRowCount(6);
        container.add(new JScrollPane(tree), BorderLayout.WEST);

        container.add(new JTextArea(5,20), BorderLayout.CENTER);

        final JCheckBox enable = new JCheckBox("Enable", true);
        enable.addActionListener(new ActionListener(){
            @Override
            public void actionPerformed(ActionEvent ae) {
                enableComponents(container, enable.isSelected());
            }
        });
        gui.add(enable, BorderLayout.SOUTH);

        JOptionPane.showMessageDialog(null, gui);
    }

    public static void main(String[] args)  {
        SwingUtilities.invokeLater(new Runnable(){
            @Override
            public void run() {
                new DisableAllInContainer();
            }
        });
    }}